Re: venturer car dvd screens
Umm Looking at small..ish displays for the pi - I have 4 of these screens 2 7inch and 2 6.2 inch (IIRC) the dvd players went west years ago and I am wondering how to find out if they are analogue or digital. Neither set has a separate component in they all connect with a 9pin miniDin. Given that I am assuming that they need power - 2 pins L and R channel sound and IR return to player that would leave 4 pins - what are the chances that video gnd and video signal are 2 of the remaining pins. (sometime in the past I seem to recall that one of the other pins is some standby signal. They are quite old probably in the 5-7 years region do you tink its worth checking out?
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Phil Spiegel
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Re: venturer car dvd screens
One extra lead could be 'handbrake on'- to prevent use when driving if visible to the driver.
There may also be a choice of sources -if the lcd unit was designed for generic usage?
Colour-coding of wires may assist you inside the case.
There may also be a choice of sources -if the lcd unit was designed for generic usage?
Colour-coding of wires may assist you inside the case.
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kevinbuckland
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Re: venturer car dvd screens
Galaxynik said:
Umm Looking at small..ish displays for the pi - I have 4 of these screens 2 7inch and 2 6.2 inch (IIRC) the dvd players went west years ago and I am wondering how to find out if they are analogue or digital. Neither set has a separate component in they all connect with a 9pin miniDin. Given that I am assuming that they need power - 2 pins L and R channel sound and IR return to player that would leave 4 pins - what are the chances that video gnd and video signal are 2 of the remaining pins. (sometime in the past I seem to recall that one of the other pins is some standby signal. They are quite old probably in the 5-7 years region do you tink its worth checking out?
A guess but almost certainly analogue.
Umm Looking at small..ish displays for the pi - I have 4 of these screens 2 7inch and 2 6.2 inch (IIRC) the dvd players went west years ago and I am wondering how to find out if they are analogue or digital. Neither set has a separate component in they all connect with a 9pin miniDin. Given that I am assuming that they need power - 2 pins L and R channel sound and IR return to player that would leave 4 pins - what are the chances that video gnd and video signal are 2 of the remaining pins. (sometime in the past I seem to recall that one of the other pins is some standby signal. They are quite old probably in the 5-7 years region do you tink its worth checking out?
A guess but almost certainly analogue.
Re: venturer car dvd screens
Cheers - probably worth investigating further then.
Re: venturer car dvd screens
Oh, yes, there sure is a chance that the displays are analog/composite, compatbile with the composite vidieo output of the RPi.
I was thinking: No way they are HDMI, but there is an composite out on the RPi as well!
I'n that case, I'm going to have an RPi in my car too. When they become available in volume... USB wifi stick: When the car is "home" it can see my base station and offload data. GPS, route planning (openstreetmap) etc. etc. Nice!
I was thinking: No way they are HDMI, but there is an composite out on the RPi as well!
I'n that case, I'm going to have an RPi in my car too. When they become available in volume... USB wifi stick: When the car is "home" it can see my base station and offload data. GPS, route planning (openstreetmap) etc. etc. Nice!
Check out our raspberry pi addons: https://www.bitwizard.nl/shop/
Re: venturer car dvd screens
Galaxynik said:
They are quite old probably in the 5-7 years region do you tink its worth checking out?
Definitely.
I have got Venturer 7.2" screens working with composite video and have worked out the pin out of 9-pin mini-DIN, operating voltages and current, and how to connect directly to the LCD board itself within the ones I have. Mine now have just three wires out the back; 0V, +V and composite video in.
No idea how well they will work with an R-Pi but they are not great resolution nor "wow" quality. Analogue composite video only, stereo in but only one speaker. Okay with images, video and chunky EPG displays but pretty poor on small text. I paid £5 for two so a bargain there but I wouldn't invest serious money in buying them.
I have pinouts, specs and what I've done documented ( bar photos and needs formatting ) but not sure where best to put that. I was waiting until I had an R-Pi so could document how to set the R-Pi to use it as well but that's going to be some time away.
They are quite old probably in the 5-7 years region do you tink its worth checking out?
Definitely.
I have got Venturer 7.2" screens working with composite video and have worked out the pin out of 9-pin mini-DIN, operating voltages and current, and how to connect directly to the LCD board itself within the ones I have. Mine now have just three wires out the back; 0V, +V and composite video in.
No idea how well they will work with an R-Pi but they are not great resolution nor "wow" quality. Analogue composite video only, stereo in but only one speaker. Okay with images, video and chunky EPG displays but pretty poor on small text. I paid £5 for two so a bargain there but I wouldn't invest serious money in buying them.
I have pinouts, specs and what I've done documented ( bar photos and needs formatting ) but not sure where best to put that. I was waiting until I had an R-Pi so could document how to set the R-Pi to use it as well but that's going to be some time away.
Re: venturer car dvd screens
This is what I have but entirely at your own risk if you try it.
I suggest checking all 0V are joined so you're sure of the pinout and getting it to power-up using a bench supply with current limiting for safety.
In the absence of a current means to provide images you'll have to make do with this description of the pinout, looking into the socket on the monitor, so it's skull shaped ( likely with LCD facing upwards ), from top to bottom, three pins, four pins, two pins, left to right …
Top row – 12V, Standby, <gap>, 0V
Middle Row – 0V, Audio in, Audio in, IR output
Bottom row – 0V, Video in
The 0V are all joined and also connects to the metal ring / shield around the socket.
+12V In
Power Supply Input
Nominally a 12V input but operation appears to be acceptable down to around 8V. Operation at 5V is not possible. Current drawn is around 550mA at 12V with the video input disconnected or displaying a black screen. In standby mode the current drawn falls to around 30mA at 12V. A typical 12V @ 1A power supply, as used by a router or hub, should be acceptable for powering the monitor.
0V
Power Supply 0V / Ground
Standby
Standby / Enable Signal
This is notionally an input signal to the LCD. When left floating the standby mode is entered; the LCD is powered down and the standby LED is illuminated. When connected to 0V the LCD is powered up and the standby LED is turned off.
Audio In
Left and Right Audio Input
IR Out
Signal from inbuilt IR Receiver
Signal is normally about 5V pulsing low when an IR signal is present. The IR receiver appears to carry the signal transparently so any IR remote control protocol should be receivable
Video In
Composite Video Input
I suggest checking all 0V are joined so you're sure of the pinout and getting it to power-up using a bench supply with current limiting for safety.
In the absence of a current means to provide images you'll have to make do with this description of the pinout, looking into the socket on the monitor, so it's skull shaped ( likely with LCD facing upwards ), from top to bottom, three pins, four pins, two pins, left to right …
Top row – 12V, Standby, <gap>, 0V
Middle Row – 0V, Audio in, Audio in, IR output
Bottom row – 0V, Video in
The 0V are all joined and also connects to the metal ring / shield around the socket.
+12V In
Power Supply Input
Nominally a 12V input but operation appears to be acceptable down to around 8V. Operation at 5V is not possible. Current drawn is around 550mA at 12V with the video input disconnected or displaying a black screen. In standby mode the current drawn falls to around 30mA at 12V. A typical 12V @ 1A power supply, as used by a router or hub, should be acceptable for powering the monitor.
0V
Power Supply 0V / Ground
Standby
Standby / Enable Signal
This is notionally an input signal to the LCD. When left floating the standby mode is entered; the LCD is powered down and the standby LED is illuminated. When connected to 0V the LCD is powered up and the standby LED is turned off.
Audio In
Left and Right Audio Input
IR Out
Signal from inbuilt IR Receiver
Signal is normally about 5V pulsing low when an IR signal is present. The IR receiver appears to carry the signal transparently so any IR remote control protocol should be receivable
Video In
Composite Video Input
Re: venturer car dvd screens
you star +rep